LIBRERIAS

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CARGA DE DATOS

df_artist <- read.csv("data/df_artist_sin_duplicados.csv")
df_charts_raw <- read.csv("data/df_charts_sin_duplicados.csv")
df_audio_features_raw <- read.csv("data/audio_features_plano_sin_duplicados.csv")
df_lyrics <- read.csv("data/df_lyrics.csv")

Corrección duplicados

# DF listo para el join con chrats
df_audio_features <- df_audio_features_raw %>% 
  group_by(track_name, external_urls_spotify) %>% 
  mutate(artist_all = paste(artist_name, collapse = ",|,")) %>%
  ungroup() %>% 
  mutate(artist_key = sub(",|,.*", "", artist_all)) %>% 
  dplyr::select(artist_name, artist_all, artist_key, everything(.)) %>% 
  distinct(artist_key, external_urls_spotify, .keep_all = T) %>% 
  as.data.frame()

Creacion cant_markets

contar_market <- function(x){
q <- length(unlist(strsplit(x, split = ",")))
return (q)
  }
df_audio_features$cant_markets <- sapply(df_audio_features[,"markets_concat"], contar_market)

Vectores de features

CHARTS: agregación de features

#metrica de popularidad
df_charts <- df_charts_raw %>% 
  group_by(Artist, Track_Name, URL) %>%
  dplyr:: summarise(semanas_sum = n(),
            streams_sum = (sum(Streams, na.rm = T)/10^6 ),
            streams_min = (min(Streams)/10^6 ),
            streams_max = (max(Streams)/10^6 ),
            position_avg = mean(Position, na.rm = T),
            position_min = min(Position), 
            position_max = max(Position)) %>% 
  ungroup() %>% 
  mutate(popularidad = as.numeric(streams_sum*semanas_sum/position_avg) )
`summarise()` has grouped output by 'Artist', 'Track_Name'. You can override using the `.groups` argument.

Agregación de todas las semanas en charts


groupping_cols <- c("artist_name","artist_all","artist_key",
                    "track_name","external_urls_spotify","album_name","album_release_year")

numeric_col_charts <- c("Position","Streams")

week_start <- c("week_start")

chart_group <- join_audio_charts %>% 
                group_by(artist_name,artist_all,artist_key,track_name,
                         external_urls_spotify,album_name,album_release_year)


continuas_summarized = chart_group %>% summarise_at(features_continuas, mean, na.rm = TRUE)
categoricas_summarizes = chart_group %>% summarise_at(features_categoricas, first)
numeric_charts_summarizes = chart_group %>% summarise(across(numeric_col_charts,
                                                             list(min=min,max=max,avg=mean)))

cant_semanas = chart_group %>% summarise_at(week_start, n_distinct)
names(cant_semanas$week_start) <- "cant_semanas"

aggregation_df <- cbind(numeric_charts_summarizes,
                        cant_semanas[,-c(1:7)],continuas_summarized[,-c(1:7)], 
                        categoricas_summarizes[,-c(1:7)])

names(aggregation_df)[names(aggregation_df) == 'week_start'] <- "cant_semanas"

cols <- names(aggregation_df)
numeric_cols <- cols[sapply(aggregation_df,is.numeric)]

summary(aggregation_df[,numeric_cols[2:length(numeric_cols)]])

RIGTH JOIN audio_features Y charts

md.pattern(join_audio_charts, rotate.names = TRUE)
     artist_key track_name external_urls_spotify semanas_sum streams_sum streams_min
1975          1          1                     1           1           1           1
2             1          1                     1           1           1           1
1326          1          1                     1           1           1           1
              0          0                     0           0           0           0
     streams_max position_avg position_min position_max popularidad artist_name
1975           1            1            1            1           1           1
2              1            1            1            1           1           1
1326           1            1            1            1           1           0
               0            0            0            0           0        1326
     artist_all album_name acousticness danceability duration_ms energy instrumentalness
1975          1          1            1            1           1      1                1
2             1          1            1            1           1      1                1
1326          0          0            0            0           0      0                0
           1326       1326         1326         1326        1326   1326             1326
     liveness loudness speechiness tempo valence cant_markets explicit key_name
1975        1        1           1     1       1            1        1        1
2           1        1           1     1       1            1        1        1
1326        0        0           0     0       0            0        0        0
         1326     1326        1326  1326    1326         1326     1326     1326
     mode_name key_mode album_release_year      
1975         1        1                  1     0
2            1        1                  0     1
1326         0        0                  0    19
          1326     1326               1328 25196

HISTOGRAMAS Y BARPLOTS DE VARIABLES


##histograma de las variables continuas de audio_features

for (i in features_continuas){

  hist(df_audio_features[,i], main = paste("Histograma de", i, "(all data)"), xlab = i)
  abline(v = mean(df_audio_features[,i], na.rm = TRUE) , col="red")
  abline(v = median(df_audio_features[,i], na.rm = TRUE) , col="blue")
  legend("topright", legend = c("Media", "Mediana"), col=c("red", "blue"), lty =1)

}

#divido los features por su distribución
features_continuas_media <- c('danceability', 'tempo', 'valence')

features_continuas_mediana <- c('acousticness', 'duration_ms', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets')


##histograma de las variables continuas de charts
for (i in c(features_continuas)){

  hist(join_audio_charts[,i], main = paste("Histograma de", i,  "(charts)"), xlab = i)
  abline(v = mean(join_audio_charts[,i], na.rm = TRUE) , col="red")
  abline(v = median(join_audio_charts[,i], na.rm = TRUE) , col="blue")

}

#divido features de charts según su distribución
audio_charts_continuas_media <- c('duration_ms', 'valence')

audio_charts_continuas_mediana <- c('danceability', 'acousticness', 'tempo', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets', "Streams")


##medidas resumen y barplots de las variables categoricas audio_features
for(i in features_categoricas){

  barplot(sort(table(df_audio_features[,i]),decreasing = T), las=2, 
          main = paste("Barplot de", i, "(all data)"))
  # pie(table(df_features_categoricos[,i]))
}



##medidas resumen y barplots de las variables categoricas join_audio_charts

for(i in features_categoricas){
  barplot(table(join_audio_charts[,i]), las=2,
          main = paste("Barplot de", i, "(charts)")
          )
  # pie(table(df_features_categoricos[,i]))
}

SESGO DE VARIABLES

Boxplots Variables Numéricas sin filtrar outliers

par(mfrow=c(4,3))
for (feature in features_continuas){
  boxplot(df_audio_features[,feature], las=2, horizontal=T, main=feature)
}

Con excepción de valence el resto de las features poseían cierto sesgo. Se decidió transformar las variables que mayor sesgo poseían: duration_ms, instrumentalness, liveness, speechiness como método de corregir la distribución y achicar la cantidad de outliers. La variable loudness_reg_imp no fue modificada debido a que al ser negativa

Transformaciones

Transformación logarítmica

#join entre variables transformadas y resto features
x <- df_audio_features %>% 
  select("artist_name","artist_all","artist_key",
         "track_name", "external_urls_spotify", "album_name", "album_release_year",
         all_of(features_continuas), all_of(features_categoricas)) %>%
  select(!variables_sesgo) 

join_audio_charts <- cbind(x, df_sesgadas_log_adjust) %>% 
  right_join( df_charts %>%
               select( "Track_Name", "Artist", 
                       "URL","Position", "Streams", "week_start", "week_end"),
               by = c("track_name" = "Track_Name", 
                      "artist_key" ="Artist", 
                      "external_urls_spotify" = "URL"))

variables_plot <- unlist(strsplit("duration_ms", ","))
variables_plot <- append(variables_plot, paste(variables_plot,"_log", sep=""))
variables_plot <- variables_plot[order(variables_plot)]
plotear <- merged[,variables_plot]

par(mfrow = c(1,2))
for (col in names(plotear)){
  hist(plotear[,col], breaks="FD", main=col, xlab="")
}

transformacion <- c('instrumentalness','loudness','liveness','speechiness', 'duration_ms')

logaritmo_ajustado = function(x,delta){
  if (x<=0.0){
    return(log(0.00+delta, base = 10))
  }else{
    return(log(x, base = 10))
  }
}

delta <- 10^(-6)

par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}

for (feature in transformacion){
  hist(unlist(lapply(df_audio_features[,feature], function(x) logaritmo_ajustado(x,delta))), main=paste(feature,"log", sep="_"))
}

inv_sqrt_ajustada = function(x, delta){
  if (x==0.0){
    return(1/sqrt(x+delta))
  }else{
    return(1/sqrt(x))
  }
}


delta <- 10^(-6)

par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}
for (feature in transformacion){
  hist(unlist(lapply(df_audio_features[,feature], function(x) inv_sqrt_ajustada(x,delta))), main=paste(feature,"inv_sqt", sep="_"))
}


par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}
for (feature in transformacion){
  hist(sqrt(df_audio_features[,feature]), main=paste(feature,"sqrt", sep="_"))
}

par(mfrow = c(2,1)) 
hist(df_audio_features[,'loudness_reg_imp'], main='loudness', xlab="")
#hist(sqrt(df_audio_features[,'loudness_reg_imp']), main= 'loudness_sqrt', xlab="")
boxplot(df_audio_features[,'loudness_reg_imp'], horizontal = T)
#boxplot(sqrt(df_audio_features[,'loudness_reg_imp']), horizontal = T)
fit <- lm(loudness~energy+acousticness, data=df_audio_features)

modelo <- fit$coefficients

df_audio_features$loudness_reg_imp <- df_audio_features$loudness

X <- df_audio_features[df_audio_features$loudness>0, c('energy', "acousticness")]

df_audio_features$loudness_reg_imp[df_audio_features$loudness>0] <- modelo[1]+modelo[2]*X[,1]+modelo[3]*X[,2]

summary(df_audio_features[,c("loudness", "loudness_reg_imp")])

summary(fit)

instrumentalness tiene mucho sesgo la variable. Se va a recurrir a una logaritmización de la variable, previa transformación del dominio, haciendo que los valores que son 0, sean en realidad 0.0000001

logaritmo_ajustado = function(x,delta){
  if (x==0.0){
    return(log(x+delta, base = 10))
  }else{
    return(log(x, base = 10))
  }
}

delta <- 10^(-6)

df_audio_features$instrumentalness_logadjust <- unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta)))

par(mfrow =c(2,2))
hist(df_audio_features$instrumentalness, main="insrumentalness", xlab="")
hist(unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta))), main='instrumentalness_logadjust', ylim = c(0,130500), xlab = "")
boxplot(df_audio_features$instrumentalness, main="", horizontal = T)
boxplot(unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta))), main="", horizontal=T)
# hist(log(1/sqrt(df_audio_features$instrumentalness+0.00001)),main='log(sqrt(x+))', ylim=c(0,130500), xlab = "")

¿Es útil esta transformación?


delta <- 10^(-6)

df_audio_features$instrumentalness_logadjust <- unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta)))

df_chart_tojoin <- df_charts[,c("Track_Name", "Artist", "URL")]
df_chart_tojoin$isinchart <- 1
df_audio_features_tojoin <- df_audio_features[, c("track_name","artist_key","external_urls_spotify","instrumentalness", "instrumentalness_logadjust")]

join_histogram <- df_audio_features_tojoin %>% 
  dplyr::select("track_name","artist_key","external_urls_spotify","instrumentalness", "instrumentalness_logadjust") %>% 
  left_join( df_chart_tojoin %>%
               select("Track_Name", "Artist", "URL","isinchart"),
               by = c(
                 "track_name" = "Track_Name", 
                      "artist_key" ="Artist", 
                      "external_urls_spotify" = "URL"))


join_histogram$isinchart[is.na(join_histogram$isinchart)] <- 0

join_histogram$isinchart <- factor(join_histogram$isinchart)


h11 <- hist(join_histogram[join_histogram$isinchart==1,'instrumentalness'])
h11$density <-  h11$counts/sum(h11$counts)*100

h12 <- hist(join_histogram[join_histogram$isinchart==0,'instrumentalness'])
h12$density <-  h12$counts/sum(h12$counts)*100

h21 <- hist(join_histogram[join_histogram$isinchart==1,'instrumentalness_logadjust'])
h21$density <-  h21$counts/sum(h21$counts)*100

h22 <- hist(join_histogram[join_histogram$isinchart==0,'instrumentalness_logadjust'])
h22$density <-  h22$counts/sum(h22$counts)*100

#png("C:/Users/Asus/Desktop/DATA SCIENCE/MAESTRIA/Data Mining/TP/graficos/instrumentalness.png",
#    width = 800, height = 800)
par(mfrow = c(3,2))
plot(h11, main='instrumentalness \nchart', xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h12, main='instrumentalness \nfuera chart', xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h21, main ="instrumentalness_log \nchart", xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h22, main ="instrumentalness_log \nfuera chart", xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
boxplot(join_histogram[join_histogram$isinchart==1,'instrumentalness_logadjust'], main="instrumentalness_log chart", horizontal = T)
boxplot(join_histogram[join_histogram$isinchart==0,'instrumentalness_logadjust'], main="instrumentalness_log fuera chart", horizontal = T)
#dev.off()

Z-Score de Variables que “tienden a la normal”


################################

## FILTRAMOS OUTLIERS POR Z-SCORE para 'danceability', 'tempo', 'valence'

##############################

#z-score para variables que tienden a la normal
#filtro features numericos 

#divido los features por su distribución
features_continuas_media <- c('danceability', 'tempo', 'valence')
df_audio_features_zscore_media <- df_audio_features[,features_continuas_media]

#normalizo z score con las variables que tienden a la normal

zscore_cols <- c()
for(col in names(df_audio_features_zscore_media)){
  name_col <- paste('zscore_',col, sep = "")
  zscore_cols <- append(zscore_cols, name_col)
  media <-  mean(df_audio_features_zscore_media[,col])
  stdv <- sd(df_audio_features_zscore_media[,col])
  df_audio_features_zscore_media[,name_col] <- (df_audio_features_zscore_media[,col] - media)/stdv
  }

par(mfrow=c(1,length(zscore_cols)))
lapply(zscore_cols, function(col) boxplot(df_audio_features_zscore_media[,col],xlab=col))

Analisis de Z-Score por variable

Danceability

#variable: danceability

umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_danceability> umbral_zscore) | (df_audio_features_zscore_media$zscore_danceability< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, danceability ) %>%
  arrange(-danceability)

Tempo

#variable: Tempo

umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_tempo> umbral_zscore) | (df_audio_features_zscore_media$zscore_tempo< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, tempo ) %>%
  arrange(-tempo)

Valence

#variable: valence
umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_valence> umbral_zscore) | (df_audio_features_zscore_media$zscore_valence< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, valence ) %>%
  arrange(-valence)

Z-Score Modificado de Variables Asimetricas

################################

## FILTRAMOS OUTLIERS POR Z-SCORE MODIFICADO para 'acousticness', 'duration_ms', 'energy',  'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets'

##############################

features_continuas_mediana <- c('acousticness', 'duration_ms', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets')

df_audio_features_zscore_mediana <- df_audio_features[,features_continuas_mediana]



zscoremodif_cols <- c()
for(col in names(df_audio_features_zscore_mediana)){
  name_col <- paste('zscoremodif_',col, sep = "")
  zscoremodif_cols <- append(zscoremodif_cols, name_col)
  med = median(df_audio_features_zscore_mediana[,col], na.rm = T)
  MAD = median(abs(df_audio_features_zscore_mediana[,col] - med), na.rm = T)
  df_audio_features_zscore_mediana[, name_col] <- 0.6745 * (df_audio_features_zscore_mediana[,col] - med) / MAD
}


par(mfrow=c(4,2))
lapply(zscoremodif_cols, function(col) boxplot(df_audio_features_zscore_mediana[,col],xlab=col, horizontal = T))

Revisión Variable Instrumentalness

instrumentalness <- c("instrumentalness", "zscoremodif_instrumentalness") 

x <- df_audio_features$instrumentalness

n_interv <- 10


intervalos <- round(seq(0,max(x),by=(max(x)-min(x))/n_interv),2)

labs <- c()
for (i in 1:n_interv){
lab <- paste(intervalos[i],intervalos[i+1], sep='\n')
labs <- append(labs, lab)
    
}

bins <- cut(x, n_interv, include.lowest = TRUE, labels = labs)

barplot(table(bins))

Hacemos K-means para poder discretizar la variable.

sse <- c()
for (k in 2:6){
  clusters <- kmeans(df_audio_features$instrumentalness,centers = k, iter.max = 10, nstart = k)
  sse <- append(sse, clusters$tot.withinss)
}

plot(2:6,sse, type = 'l', xlab='Cantidad de Clusters', ylab='Suma Error Cuadrático')

#k=3 
clusters3 <- kmeans(df_audio_features$instrumentalness,centers = 3, iter.max = 10, nstart = 3)

df_audio_features$clusters <- factor(clusters3$cluster)

lev <- levels(df_audio_features$clusters)

labs <- c()
for (i in lev){
  min <- min(df_audio_features$instrumentalness[df_audio_features$clusters==i])
  max <- max(df_audio_features$instrumentalness[df_audio_features$clusters==i])
  lab <- paste(min,max, sep=' - ')
  labs <- append(labs, lab)
}

labs

# barplot(table(factor(clusters3$cluster)), labels = labs)

#prueba igal de transformacion y test de normalidad

join_audio_charts[1:5,"acousticness"]^2

library(nortest)

log10(df_chart_w_lyrics$acousticness)

for (i in features_continuas){
   x <- log10(df_chart_w_lyrics[,i])
   x <- shapiro.test(x)
   z <- x$p.value
  print(z)
  }

LYRICS

Filtro por idioma

# lyrics = mongo(collection = "lyrics", db = "spotify_dm" )
# df_lyrics <- lyrics$find('{}')
# 
# write.csv(df_lyrics, "data/df_lyrics.csv")

df_lyrics <- read.csv("data/df_lyrics.csv") %>% 
  select(-X)

df_lyrics_unicas <- df_lyrics %>% 
  distinct(artist_name, track_name, lyrics)


#filtro de idioma
spa_lyrics = df_lyrics_unicas[textcat(df_lyrics_unicas$lyrics)=="spanish",]
spa_lyrics

en_lyrics = df_lyrics_unicas[textcat(df_lyrics_unicas$lyrics) %in% c("english", "scots"),]
en_lyrics

#chequeo cantidad de canciones por idioma
100*(nrow(en_lyrics) + nrow(spa_lyrics))/nrow(df_lyrics_unicas)

# tabla contingencia de idiomas
idiomas = textcat(df_lyrics_unicas$lyrics)
# sort(table(idiomas), decreasing = T)

limpieza español

# comentar y descomentar según se elija un dataframe u otro
# df_lyrics_seleccionado = df_lyrics_unicas
df_lyrics_seleccionado = en_lyrics

corpus = Corpus(VectorSource(enc2utf8(df_lyrics_seleccionado$lyrics)))

# Eliminamos espacios
corpus.pro <- tm_map(corpus, stripWhitespace)
inspect(corpus.pro[1])

# Elimino todo lo que aparece antes del primer []
corpus.pro <- tm_map(corpus.pro, content_transformer(
  function(x) sub('^.+?\\[.*?\\]',"", x)))
# inspect(corpus.pro[1])

# Elimino las aclaraciones en las canciones, por ejemplo:
# [Verso 1: Luis Fonsi & Daddy Yankee]
corpus.pro <- tm_map(corpus.pro, content_transformer(
  function(x) gsub('\\[.*?\\]', '', x)))

# Elimino todo lo que aparece luego de 'More on Genius'
corpus.pro <- tm_map(corpus.pro, content_transformer(function(x) gsub("More on Genius.*","", x)))

# Convertimos el texto a minúsculas
corpus.pro <- tm_map(corpus.pro, content_transformer(tolower))

# removemos números
corpus.pro <- tm_map(corpus.pro, removeNumbers)

# Podemos agregar palabras a las stopwords
# my_stopwords <- append(stopwords("spanish"), 'palabra')
my_stopwords <- append(stopwords("english"), c('yeah', "aint", "get", "got"))

# Removemos palabras vacias 
corpus.pro <- tm_map(corpus.pro, removeWords, stopwords("english"))
corpus.pro <- tm_map(corpus.pro, removeWords, my_stopwords)
# corpus.pro <- tm_map(corpus.pro, removeWords, stopwords("spanish"))
# inspect(corpus.pro[1])


# Removemos puntuaciones
corpus.pro <- tm_map(corpus.pro, removePunctuation)

# Removemos todo lo que no es alfanumérico
corpus.pro <- tm_map(corpus.pro, content_transformer(function(x) str_replace_all(x, "[[:punct:]]", " ")))

# En tm_map podemos utilizar funciones prop
library(stringi)
replaceAcentos <- function(x) {stri_trans_general(x, "Latin-ASCII")}
corpus.pro <- tm_map(corpus.pro, replaceAcentos)

# Eliminamos espacios que se van generando con los reemplazos
corpus.pro <- tm_map(corpus.pro, stripWhitespace)

limpieza ingles

#funciones
#funcion para corregir palabras
decontracted = function(txt){
  txt = gsub("won't", "will not", txt)
  txt = gsub("\\'s", " is", txt)
  txt = gsub("\\'t", " not", txt)
  txt = gsub("\\'ll", " will", txt)
  txt = gsub("\\'m", " am", txt)
  txt = gsub("\\'re", " are", txt)
  txt = gsub("\\'d", " had", txt)
  txt = gsub("\\'ve", " have", txt)
  txt = gsub("couldn", "could", txt)
  txt = gsub("don", "do", txt)
  txt = gsub("doesn", "does", txt)
  txt = gsub("isn", "is", txt)
  txt = gsub("mustn", "must", txt)
  txt = gsub("shouldn", "should", txt)
  txt = gsub("wasn", "was", txt)
  txt = gsub("\\'cause", " because", txt)
  txt = gsub("\\'", "g", txt)
  return(txt)
}


#Función para limpiar. 
text_cleaning = function(txt, stop=FALSE, language){
  
  txt = sub('^.+?\\[.*?\\]',"", txt) #ok
  txt = sub("More on Genius.*","", txt)
  txt = gsub('\\[.*?\\]', '', txt)
  txt = gsub("\\n"," ", txt)
  txt = gsub("[()]", " ", txt)
  txt = tolower(txt)
  txt = decontracted(txt)
  txt = gsub("\\W+\\b", " ", txt)
  txt = gsub("\\d", " ", txt)
  
  stopwords_regex = paste(stopwords('en'), collapse = '\\b|\\b')
  stopwords_regex = paste0('\\b', stopwords_regex, '\\b')
  txt = stringr::str_replace_all(txt, stopwords_regex, '')

  my_stopwords <- c('ooh', 'yeah', "aint", "get", "got", "ayy")
  txt = stringr::str_replace_all(txt, my_stopwords, '')
   
  txt = str_trim(txt)
  txt = gsub("\\n"," ", txt)
  
  if(language == "en"){
    return(txt)
  }else if (language == "es"){
    txt <- function(x) {stri_trans_general(x, "Latin-ASCII")}
      return(txt) 
  }else{
        return("Falta definir lenguaje")
      }
}

#función para obtener oraciones de una sola palabra. 
one_word_setences = function(txt){
  return(gsub("\\W+\\b", ". ", txt))
}

#limpio las letras en ingles
en_lyrics$lyrics = text_cleaning(en_lyrics$lyrics, language = "en")

head(en_lyrics$lyrics, 1)

Explicit

Español

#Diccionario español
malas_palabras_1 <- read_csv("data/malas_palabras.txt", 
    col_names = FALSE)

malas_palabras_2 <- read_csv("data/malas_palabras_translate.txt", 
    col_names = FALSE)

malas_palabras_3 <- read_csv("data/malas_palabras_wiki.txt", 
    col_names = FALSE) %>% 
  select(X1)

malas_palabras_4 <- read_csv("data/palabras_profanas_es.txt", 
                             col_names = FALSE)

malas_palabras <- rbind(malas_palabras_1, malas_palabras_2,
                        malas_palabras_3, malas_palabras_4)


#Función para limpiar. 
text_cleaning_esp = function(txt, stop=FALSE){
  txt = sub('^.+?\\[.*?\\]',"", txt) #ok
  txt = sub("More on Genius.*","", txt)
  txt = gsub('\\[.*?\\]', '', txt)
  txt = gsub("\\n"," ", txt)
  txt = gsub("[()]", " ", txt)
  txt = tolower(txt)
  # txt = decontracted(txt)
  txt = gsub("\\W+\\b", " ", txt)
  txt = gsub("\\d", " ", txt)
  txt = str_trim(txt)
  # txt = stri_trans_general(txt, "Latin-ASCII")
  return(txt)
}


malas_palabras$limpias = text_cleaning(malas_palabras$X1)
malas_palabras

malas_palabras %>% filter(startsWith(limpias, "g"))

Inglés

#Genero lista de malas palabras
bad_words <- c()
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_zac_anger)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_alvarez)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_arr_bad)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_racist)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_banned)))
bad_words <- unique(bad_words)

biglou <- read.csv("https://www.cs.cmu.edu/~biglou/resources/bad-words.txt", header=FALSE, col.names = c("words"))


#Función para obtener palabras profanas de cada lyric
get_profanities = function(txt, profanity_lst){
  # txt = text_cleaning(txt)
  words = as.data.frame(strsplit(txt, "[ ]+"), col.names = "words")
  profan_df = profanity(get_sentences(words), profanity_list = profanity_lst)
  profan_words = profan_df[profan_df$profanity_count!=0,]$words
  vector = as.vector(profan_words)
  if (length(vector)==0){
    return(NULL)
  }
  else{return(as.vector(profan_words))
    }
}



en_lyrics$profabe_biglou <- lapply(en_lyrics$lyrics,  function(x) get_profanities(x, biglou$words))

en_lyrics %>% 
  mutate(profane_biglou = unlist(get_profanities(lyrics, biglou$words)))

en_lyrics$profabe_biglou = unlist(strsplit(en_lyrics$profabe_biglou, split = " "))

en_lyrics$profabe_badwords <- lapply(en_lyrics$lyrics, function(x) get_profanities(x, bad_words))

str(en_lyrics)
head(en_lyrics,1)

en_lyrics$profabe_biglou[3]

MATRIZ TERMINO DOCUMENTO

####################################################################
####### Generación de la Matríz Término-Documento del corpus #######
####################################################################
corpus.pro2tdm <- function(corpus, ponderacion, n_terms){
  #corpus
  
  
  #matriz TD 
  dtm <- TermDocumentMatrix(corpus,
                            control = list(weighting = ponderacion))
  matriz_td <- as.matrix(dtm)
  
  
  # Calculamos la frecuencia de cada término en el corpus
  freq_term <- head(sort(rowSums(matriz_td),decreasing=TRUE), n_terms)
  
  #matriz transpuesta de los n_terms mas frecuentes
  matriz_nf <- t(matriz_td[sort(names(freq_term)), ])
  
  #pasaje a binario
  matriz_nf[matriz_nf>0] <- 1
  
  return(matriz_nf)
  
  }
  
corpus_eng = Corpus(VectorSource(enc2utf8(en_lyrics$lyrics)))
matriz <- corpus.pro2tdm(corpus = corpus_eng, ponderacion= "weightTf",n_terms= 150)

dim(matriz)

df_tm <- as.data.frame(matriz)
head(df_tm,2)

## Join matriz de palabras con artista y track
df_ly_feat <- cbind(df_lyrics_seleccionado[-c(3)], df_tm)

nrow(df_tm)
nrow(df_lyrics_seleccionado)
nrow(df_ly_feat)

filter <- !names(df_ly_feat) %in% c("artist_name", "track_name" )

df_ly_feat_ok <- df_ly_feat[, filter]
# df_ly_feat_ok = df_ly_feat_ok[, -(which(colSums(df_ly_feat_ok) == 0))]

# colSums(df_ly_feat_ok)

head(df_ly_feat_ok, 3)
head(df_ly_feat, 3)


df_ly_feat$id = 1:nrow(df_ly_feat)

df_melt <- reshape2::melt(data = df_ly_feat[,3:ncol(df_ly_feat)], id.vars = c("id"))  %>%
  arrange(id)

df_melt <- df_melt[df_melt$value != 0,]

df_melt_txt <- df_melt[df_melt$value == 1,]
df_melt_cat <- df_melt[df_melt$value != 1,]

head(df_melt_txt )
dim(df_melt_txt )

#denomino a los términos profanos
df_melt_txt <- df_melt_txt %>% 
  mutate(variable = case_when(as.character(variable) %in% biglou$words ~
                                paste0("PROF_", as.character(variable)),
                              T ~ paste0("TERM_", as.character(variable))
                              )  
         )

df_melt_txt %>% filter(startsWith(variable, "PROF"))


# df_melt_txt[df_melt_txt$variable %in% biglou$words,]


df_melt_txt_to_ruls <- df_melt_txt[, -c(3)]
names(df_melt_txt_to_ruls) <- c("id", "item")

write.table(df_melt_txt_to_ruls, file="data/transaccions_lyrics_features.txt", row.names = F)

# Reglas
# chequear nan's
lyrics_trans <- read.transactions("data/transaccions_lyrics_features.txt", format = "single", cols = c(1,2))

arules::inspect(head(lyrics_trans, 3))

summary(lyrics_trans)
reglas <- apriori(lyrics_trans, parameter = list(support=0.1,
                    confidence = 0.5, target  = "rules"  ))

reglas_sub <- subset(reglas, subset = rhs %pin% "PROF_")
arules::inspect(head(sort(reglas_sub, by = "lift", decreasing = T),5))

Carga de Igal (UNIFICAR)

Explicit

contar malas palabras (Parte de Igal: UNIFICAR)


bad_words <- c()
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_zac_anger)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_alvarez)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_arr_bad)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_racist)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_banned)))

bad_words <- unique(bad_words)


contar_bad_words <- function(x){
  x <- profanity(x,profanity_list = bad_words)
  q <- sum(x$profanity_count)
  return (q)
  }
df_chart_w_lyrics$cant_bad_words <- sapply(df_chart_w_lyrics[,"lyrics"], contar_bad_words)


df_chart_w_lyrics_only_explicit <- df_chart_w_lyrics[df_chart_w_lyrics$explicit==TRUE & df_chart_w_lyrics$cant_bad_words > 0, ]

hist(df_chart_w_lyrics_only_explicit$cant_bad_words)


#creo vars categóricas
df_chart_w_lyrics_only_explicit$nivel_puteada <- cut(df_chart_w_lyrics_only_explicit$cant_bad_words, breaks = c(0,10,20,50,Inf), labels=c("bajo","poco","alto","muy_alto"))

df_chart_w_lyrics_only_explicit$nivel_ranking <- cut(df_chart_w_lyrics_only_explicit$position_avg, breaks = c(1,100,Inf), labels=c("1a100","100a200"))

df_chart_w_lyrics_only_explicit$nivel_popularidad <- cut(sqrt(df_chart_w_lyrics_only_explicit$cant_bad_words), breaks = c(0,10,20,50,Inf), labels=c("bajo","poco","alto","muy_alto"))

transactions <- as(as.data.frame(apply(df_chart_w_lyrics_only_explicit, 2, as.factor)), "transactions")
rules = apriori(transactions, parameter=list(target="rules", confidence=0.25, support=0.1))
rules.sub <- subset(rules, subset = lhs %pin% "nivel_puteada" & rhs %pin% "nivel_ranking")
inspect(head(sort(rules.sub, by = "lift", decreasing = TRUE),10))

# discretizacion continuas y seleccion de variables
# identificar palabras explít

LIMPIO HASTA ACA

Preguntas de investigacion

Patron Comun Canciones del Chart

¿Qué características tienen las canciones que están en el chart? ¿Cual es el patrón comun que tienen las canciones más escuchadas? (ver dispersiones, media, grafico comparativo)



#funcion para escalar variable
scale_vble <- function(x){
  (x - mean(x, na.rm = T))/sd(x, na.rm = T)
}
#anti_join
anti_join_audio_charts <- df_audio_features %>% 
  select("artist_name","artist_all", "artist_key",
         "track_name", "external_urls_spotify", "album_name", "album_release_year",
         all_of(features_continuas), all_of(features_categoricas)) %>% 
  anti_join( df_charts %>%
               select( "Track_Name", "Artist", "URL"),
               by = c("external_urls_spotify" ="URL",
                      "artist_key" ="Artist"  ))
               # by = c("track_name" = "Track_Name"))


anti_join_audio_charts_complete <- na.omit(anti_join_audio_charts)
anti_join_audio_charts_complete_scale <- anti_join_audio_charts_complete %>% 
  distinct() %>% 
  select(features_continuas)  %>% 
  mutate_all(scale_vble)
nrow(anti_join_audio_charts_complete_scale)

Qué temas perduran mucho en el ranking

Artistas que mas aparecen en el chart

join_audio_charts %>% 
  group_by(artist_name) %>% 
  dplyr::summarise(n = n()) %>% 
  arrange(-n)

Tracks que mas aparecen en el chart

join_audio_charts %>% 
  group_by(track_name, artist_name,external_urls_spotify) %>% 
  dplyr::summarise(n = n()) %>% 
  arrange(-n) %>% 
  select(track_name, n, everything(.))

¿Cuánto tiempo están en un chart?

# cantidad de semanas que estuvieron en el chart

df_charts %>% 
  mutate(week_start=as.Date(week_start),
         week_end = as.Date(week_end),
         week_year = (year(week_start))) %>%
  arrange(Artist, Track_Name) %>% 
  group_by(Artist, Track_Name, URL) %>% 
 dplyr:: summarise( day_in = min(week_start),
             year_in = year(day_in),
             day_max = max(week_end),
             year_max = year(day_max),
             duracion_chart_dias = day_max-day_in,
             duracion_chart_anio = year_max - year_in) %>% 
  arrange(Artist)
---
title: "R Notebook"
output: html_notebook
---

# LIBRERIAS
```{r, echo=FALSE, warning=FALSE}
library(ggplot2)
library(tidyverse)
library(readxl)
library(sqldf)
library(lubridate)
library(dplyr)
library(sentimentr)
library(arules)
```

# CARGA DE DATOS  
```{r}
df_artist <- read.csv("data/df_artist_sin_duplicados.csv")
df_charts_raw <- read.csv("data/df_charts_sin_duplicados.csv")
df_audio_features_raw <- read.csv("data/audio_features_plano_sin_duplicados.csv")
df_lyrics <- read.csv("data/df_lyrics.csv")

```


## Corrección duplicados
```{r}
# DF listo para el join con chrats
df_audio_features <- df_audio_features_raw %>% 
  group_by(track_name, external_urls_spotify) %>% 
  mutate(artist_all = paste(artist_name, collapse = ",|,")) %>%
  ungroup() %>% 
  mutate(artist_key = sub(",|,.*", "", artist_all)) %>% 
  dplyr::select(artist_name, artist_all, artist_key, everything(.)) %>% 
  distinct(artist_key, external_urls_spotify, .keep_all = T) %>% 
  as.data.frame()
```

## Creacion `cant_markets`
```{r}
contar_market <- function(x){
q <- length(unlist(strsplit(x, split = ",")))
return (q)
  }
df_audio_features$cant_markets <- sapply(df_audio_features[,"markets_concat"], contar_market)
```


## Vectores de features
```{r}
#features var continuos
features_continuas <- c('acousticness', 'danceability', 'duration_ms', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness',   'tempo', 'valence', 'cant_markets')

#features var_ categóricas
features_categoricas <- c('explicit', 'key_name', 'mode_name', "key_mode")

```


# CHARTS: agregación de features
```{r}
#metrica de popularidad
df_charts <- df_charts_raw %>% 
  group_by(Artist, Track_Name, URL) %>%
  dplyr:: summarise(semanas_sum = n(),
            streams_sum = (sum(Streams, na.rm = T)/10^6 ),
            streams_min = (min(Streams)/10^6 ),
            streams_max = (max(Streams)/10^6 ),
            position_avg = mean(Position, na.rm = T),
            position_min = min(Position), 
            position_max = max(Position)) %>% 
  ungroup() %>% 
  mutate(popularidad = as.numeric(streams_sum*semanas_sum/position_avg) )

```



## Agregación de todas las semanas en charts
```{r, warning=FALSE}

groupping_cols <- c("artist_name","artist_all","artist_key",
                    "track_name","external_urls_spotify","album_name","album_release_year")

numeric_col_charts <- c("Position","Streams")

week_start <- c("week_start")

chart_group <- join_audio_charts %>% 
                group_by(artist_name,artist_all,artist_key,track_name,
                         external_urls_spotify,album_name,album_release_year)


continuas_summarized = chart_group %>% summarise_at(features_continuas, mean, na.rm = TRUE)
categoricas_summarizes = chart_group %>% summarise_at(features_categoricas, first)
numeric_charts_summarizes = chart_group %>% summarise(across(numeric_col_charts,
                                                             list(min=min,max=max,avg=mean)))

cant_semanas = chart_group %>% summarise_at(week_start, n_distinct)
names(cant_semanas$week_start) <- "cant_semanas"

aggregation_df <- cbind(numeric_charts_summarizes,
                        cant_semanas[,-c(1:7)],continuas_summarized[,-c(1:7)], 
                        categoricas_summarizes[,-c(1:7)])

names(aggregation_df)[names(aggregation_df) == 'week_start'] <- "cant_semanas"

cols <- names(aggregation_df)
numeric_cols <- cols[sapply(aggregation_df,is.numeric)]

summary(aggregation_df[,numeric_cols[2:length(numeric_cols)]])


```




# RIGTH JOIN `audio_features` Y `charts`
```{r}
#Armamos un join para tener una tabla de charts con las caracteristicas de las canciones
# deberian quedar 22993 filas completas
join_audio_charts <- df_audio_features %>% 
  select("artist_name","artist_all","artist_key",
         "track_name", "external_urls_spotify", "album_name", "album_release_year",
         all_of(features_continuas), all_of(features_categoricas)) %>% 
  right_join( df_charts,# %>%
               by = c(
                 "track_name" = "Track_Name", 
                      "artist_key" ="Artist", 
                      "external_urls_spotify" = "URL"))

#HAY CHARTS QUE NO TIENEN FEATURES. HAY QUE TENERLO EN CUENTA PARA EL ANÁLISIS
library(mice)
md.pattern(join_audio_charts, rotate.names = TRUE)

```



# HISTOGRAMAS Y BARPLOTS DE VARIABLES
```{r}

##histograma de las variables continuas de audio_features

for (i in features_continuas){

  hist(df_audio_features[,i], main = paste("Histograma de", i, "(all data)"), xlab = i)
  abline(v = mean(df_audio_features[,i], na.rm = TRUE) , col="red")
  abline(v = median(df_audio_features[,i], na.rm = TRUE) , col="blue")
  legend("topright", legend = c("Media", "Mediana"), col=c("red", "blue"), lty =1)

}

#divido los features por su distribución
features_continuas_media <- c('danceability', 'tempo', 'valence')

features_continuas_mediana <- c('acousticness', 'duration_ms', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets')


##histograma de las variables continuas de charts
for (i in c(features_continuas)){

  hist(join_audio_charts[,i], main = paste("Histograma de", i,  "(charts)"), xlab = i)
  abline(v = mean(join_audio_charts[,i], na.rm = TRUE) , col="red")
  abline(v = median(join_audio_charts[,i], na.rm = TRUE) , col="blue")

}

#divido features de charts según su distribución
audio_charts_continuas_media <- c('duration_ms', 'valence')

audio_charts_continuas_mediana <- c('danceability', 'acousticness', 'tempo', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets', "Streams")


##medidas resumen y barplots de las variables categoricas audio_features
for(i in features_categoricas){

  barplot(sort(table(df_audio_features[,i]),decreasing = T), las=2, 
          main = paste("Barplot de", i, "(all data)"))
  # pie(table(df_features_categoricos[,i]))
}



##medidas resumen y barplots de las variables categoricas join_audio_charts

for(i in features_categoricas){
  barplot(table(join_audio_charts[,i]), las=2,
          main = paste("Barplot de", i, "(charts)")
          )
  # pie(table(df_features_categoricos[,i]))
}

```



# SESGO DE VARIABLES 


## Boxplots Variables Numéricas sin filtrar outliers
```{r}
par(mfrow=c(4,3))
for (feature in features_continuas){
  boxplot(df_audio_features[,feature], las=2, horizontal=T, main=feature)
}
```

Con excepción de valence el resto de las features poseían cierto sesgo. Se decidió transformar las variables que mayor sesgo poseían: duration_ms, instrumentalness, liveness, speechiness como método de corregir la distribución y achicar la cantidad de outliers. La variable loudness_reg_imp no fue modificada debido a que al ser negativa 

## Transformaciones

### Transformación logarítmica
```{r}
# "danceability,tempo,valence,acousticness,duration_ms,energy,instrumentalness,liveness,speechiness,cant_markets"

#sesgos d las variables                                                   
sort(apply(df_audio_features[,features_continuas], MARGIN = 2, function(x){ (3* (mean(x,na.rm = T)-median(x, na.rm = T)))/sd(x, na.rm = T)} ))

variables_sesgo <- unlist(strsplit("acousticness,duration_ms,instrumentalness,liveness,speechiness,cant_markets,energy", ","))

df_sesgadas <- df_audio_features[,variables_sesgo]

logaritmo_ajustado = function(x,delta){
  if (x==0.0){
    return(log(0.00+delta, base = 10))
  }else{
    return(log(x, base = 10))
  }
}

delta <- 10^(-6)

df_sesgadas_log_adjust <- data.frame(apply(df_audio_features[,variables_sesgo], MARGIN = c(1,2), 
                                           function(x) logaritmo_ajustado(x,delta)))

ggplot(melt(df_sesgadas_log_adjust), aes(value))+
  geom_histogram()+
  facet_wrap(~variable)


####################################################
# names(df_sesgadas_log_adjust) <- paste(names(df_sesgadas), "_log", sep="")
names(df_sesgadas_log_adjust) <- names(df_sesgadas)

df_datos <- cbind(df_sesgadas, df_sesgadas_log_adjust)



a <- df_sesgadas
b <- df_sesgadas_log_adjust
names(b) <- paste(names(df_sesgadas), "_log", sep="")
merged <- cbind(a,b)

merged <- merged[, order(names(merged))]

round(sort(apply(merged, MARGIN = 2, function(x){ (3* (mean(x,na.rm = T)-median(x, na.rm = T)))/sd(x, na.rm = T)})),2)

```

```{r}
#join entre variables transformadas y resto features
x <- df_audio_features %>% 
  select("artist_name","artist_all","artist_key",
         "track_name", "external_urls_spotify", "album_name", "album_release_year",
         all_of(features_continuas), all_of(features_categoricas)) %>%
  select(!variables_sesgo) 

join_audio_charts <- cbind(x, df_sesgadas_log_adjust) %>% 
  right_join( df_charts %>%
               select( "Track_Name", "Artist", 
                       "URL","Position", "Streams", "week_start", "week_end"),
               by = c("track_name" = "Track_Name", 
                      "artist_key" ="Artist", 
                      "external_urls_spotify" = "URL"))
```


```{r}

variables_plot <- unlist(strsplit("duration_ms", ","))
variables_plot <- append(variables_plot, paste(variables_plot,"_log", sep=""))
variables_plot <- variables_plot[order(variables_plot)]
plotear <- merged[,variables_plot]

par(mfrow = c(1,2))
for (col in names(plotear)){
  hist(plotear[,col], breaks="FD", main=col, xlab="")
}

```





```{r}

transformacion <- c('instrumentalness','loudness','liveness','speechiness', 'duration_ms')

logaritmo_ajustado = function(x,delta){
  if (x<=0.0){
    return(log(0.00+delta, base = 10))
  }else{
    return(log(x, base = 10))
  }
}

delta <- 10^(-6)

par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}

for (feature in transformacion){
  hist(unlist(lapply(df_audio_features[,feature], function(x) logaritmo_ajustado(x,delta))), main=paste(feature,"log", sep="_"))
}
```

```{r}

inv_sqrt_ajustada = function(x, delta){
  if (x==0.0){
    return(1/sqrt(x+delta))
  }else{
    return(1/sqrt(x))
  }
}


delta <- 10^(-6)

par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}
for (feature in transformacion){
  hist(unlist(lapply(df_audio_features[,feature], function(x) inv_sqrt_ajustada(x,delta))), main=paste(feature,"inv_sqt", sep="_"))
}



```


```{r}


par(mfrow=c(2,5))
for (feature in transformacion){
  hist(df_audio_features[,feature], main=feature)
}
for (feature in transformacion){
  hist(sqrt(df_audio_features[,feature]), main=paste(feature,"sqrt", sep="_"))
}

```



```{r}

par(mfrow = c(2,1)) 
hist(df_audio_features[,'loudness_reg_imp'], main='loudness', xlab="")
#hist(sqrt(df_audio_features[,'loudness_reg_imp']), main= 'loudness_sqrt', xlab="")
boxplot(df_audio_features[,'loudness_reg_imp'], horizontal = T)
#boxplot(sqrt(df_audio_features[,'loudness_reg_imp']), horizontal = T)





```

```{r}
fit <- lm(loudness~energy+acousticness, data=df_audio_features)

modelo <- fit$coefficients

df_audio_features$loudness_reg_imp <- df_audio_features$loudness

X <- df_audio_features[df_audio_features$loudness>0, c('energy', "acousticness")]

df_audio_features$loudness_reg_imp[df_audio_features$loudness>0] <- modelo[1]+modelo[2]*X[,1]+modelo[3]*X[,2]

summary(df_audio_features[,c("loudness", "loudness_reg_imp")])

summary(fit)
```



`instrumentalness` tiene mucho sesgo la variable. Se va a recurrir a una logaritmización de la variable, previa transformación del dominio, haciendo que los valores que son 0, sean en realidad 0.0000001  

```{r}
logaritmo_ajustado = function(x,delta){
  if (x==0.0){
    return(log(x+delta, base = 10))
  }else{
    return(log(x, base = 10))
  }
}

delta <- 10^(-6)

df_audio_features$instrumentalness_logadjust <- unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta)))

par(mfrow =c(2,2))
hist(df_audio_features$instrumentalness, main="insrumentalness", xlab="")
hist(unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta))), main='instrumentalness_logadjust', ylim = c(0,130500), xlab = "")
boxplot(df_audio_features$instrumentalness, main="", horizontal = T)
boxplot(unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta))), main="", horizontal=T)
# hist(log(1/sqrt(df_audio_features$instrumentalness+0.00001)),main='log(sqrt(x+))', ylim=c(0,130500), xlab = "")

```

¿Es útil esta transformación? 

```{r}

delta <- 10^(-6)

df_audio_features$instrumentalness_logadjust <- unlist(lapply(df_audio_features$instrumentalness, function(x) logaritmo_ajustado(x,delta)))

df_chart_tojoin <- df_charts[,c("Track_Name", "Artist", "URL")]
df_chart_tojoin$isinchart <- 1
df_audio_features_tojoin <- df_audio_features[, c("track_name","artist_key","external_urls_spotify","instrumentalness", "instrumentalness_logadjust")]

join_histogram <- df_audio_features_tojoin %>% 
  dplyr::select("track_name","artist_key","external_urls_spotify","instrumentalness", "instrumentalness_logadjust") %>% 
  left_join( df_chart_tojoin %>%
               select("Track_Name", "Artist", "URL","isinchart"),
               by = c(
                 "track_name" = "Track_Name", 
                      "artist_key" ="Artist", 
                      "external_urls_spotify" = "URL"))


join_histogram$isinchart[is.na(join_histogram$isinchart)] <- 0

join_histogram$isinchart <- factor(join_histogram$isinchart)


h11 <- hist(join_histogram[join_histogram$isinchart==1,'instrumentalness'])
h11$density <-  h11$counts/sum(h11$counts)*100

h12 <- hist(join_histogram[join_histogram$isinchart==0,'instrumentalness'])
h12$density <-  h12$counts/sum(h12$counts)*100

h21 <- hist(join_histogram[join_histogram$isinchart==1,'instrumentalness_logadjust'])
h21$density <-  h21$counts/sum(h21$counts)*100

h22 <- hist(join_histogram[join_histogram$isinchart==0,'instrumentalness_logadjust'])
h22$density <-  h22$counts/sum(h22$counts)*100

#png("C:/Users/Asus/Desktop/DATA SCIENCE/MAESTRIA/Data Mining/TP/graficos/instrumentalness.png",
#    width = 800, height = 800)
par(mfrow = c(3,2))
plot(h11, main='instrumentalness \nchart', xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h12, main='instrumentalness \nfuera chart', xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h21, main ="instrumentalness_log \nchart", xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
plot(h22, main ="instrumentalness_log \nfuera chart", xlab="", ylab="Porcentage", freq=FALSE, col='grey', ylim = c(0,100))
boxplot(join_histogram[join_histogram$isinchart==1,'instrumentalness_logadjust'], main="instrumentalness_log chart", horizontal = T)
boxplot(join_histogram[join_histogram$isinchart==0,'instrumentalness_logadjust'], main="instrumentalness_log fuera chart", horizontal = T)
#dev.off()

```



### Z-Score de Variables que "tienden a la normal"
```{r}

################################

## FILTRAMOS OUTLIERS POR Z-SCORE para 'danceability', 'tempo', 'valence'

##############################

#z-score para variables que tienden a la normal
#filtro features numericos 

#divido los features por su distribución
features_continuas_media <- c('danceability', 'tempo', 'valence')
df_audio_features_zscore_media <- df_audio_features[,features_continuas_media]

#normalizo z score con las variables que tienden a la normal

zscore_cols <- c()
for(col in names(df_audio_features_zscore_media)){
  name_col <- paste('zscore_',col, sep = "")
  zscore_cols <- append(zscore_cols, name_col)
  media <-  mean(df_audio_features_zscore_media[,col])
  stdv <- sd(df_audio_features_zscore_media[,col])
  df_audio_features_zscore_media[,name_col] <- (df_audio_features_zscore_media[,col] - media)/stdv
  }

par(mfrow=c(1,length(zscore_cols)))
lapply(zscore_cols, function(col) boxplot(df_audio_features_zscore_media[,col],xlab=col))
```

### Analisis de Z-Score por variable
 
Danceability

```{r}
#variable: danceability

umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_danceability> umbral_zscore) | (df_audio_features_zscore_media$zscore_danceability< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, danceability ) %>%
  arrange(-danceability)
```

Tempo

```{r}
#variable: Tempo

umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_tempo> umbral_zscore) | (df_audio_features_zscore_media$zscore_tempo< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, tempo ) %>%
  arrange(-tempo)
```

Valence

```{r}
#variable: valence
umbral_zscore <- 3
conditions <- (df_audio_features_zscore_media$zscore_valence> umbral_zscore) | (df_audio_features_zscore_media$zscore_valence< -1*umbral_zscore)
df_audio_features[conditions,] %>%
  select(album_name,artist_name, valence ) %>%
  arrange(-valence)
```

### Z-Score Modificado de Variables Asimetricas

```{r}
################################

## FILTRAMOS OUTLIERS POR Z-SCORE MODIFICADO para 'acousticness', 'duration_ms', 'energy',  'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets'

##############################

features_continuas_mediana <- c('acousticness', 'duration_ms', 'energy', 'instrumentalness', 'liveness', 'loudness', 'speechiness', 'cant_markets')

df_audio_features_zscore_mediana <- df_audio_features[,features_continuas_mediana]



zscoremodif_cols <- c()
for(col in names(df_audio_features_zscore_mediana)){
  name_col <- paste('zscoremodif_',col, sep = "")
  zscoremodif_cols <- append(zscoremodif_cols, name_col)
  med = median(df_audio_features_zscore_mediana[,col], na.rm = T)
  MAD = median(abs(df_audio_features_zscore_mediana[,col] - med), na.rm = T)
  df_audio_features_zscore_mediana[, name_col] <- 0.6745 * (df_audio_features_zscore_mediana[,col] - med) / MAD
}


par(mfrow=c(4,2))
lapply(zscoremodif_cols, function(col) boxplot(df_audio_features_zscore_mediana[,col],xlab=col, horizontal = T))

```


Revisión Variable `Instrumentalness`
```{r}
instrumentalness <- c("instrumentalness", "zscoremodif_instrumentalness") 

x <- df_audio_features$instrumentalness

n_interv <- 10


intervalos <- round(seq(0,max(x),by=(max(x)-min(x))/n_interv),2)

labs <- c()
for (i in 1:n_interv){
lab <- paste(intervalos[i],intervalos[i+1], sep='\n')
labs <- append(labs, lab)
    
}

bins <- cut(x, n_interv, include.lowest = TRUE, labels = labs)

barplot(table(bins))

```

Hacemos K-means para poder discretizar la variable. 

```{r}
sse <- c()
for (k in 2:6){
  clusters <- kmeans(df_audio_features$instrumentalness,centers = k, iter.max = 10, nstart = k)
  sse <- append(sse, clusters$tot.withinss)
}

plot(2:6,sse, type = 'l', xlab='Cantidad de Clusters', ylab='Suma Error Cuadrático')

#k=3 
clusters3 <- kmeans(df_audio_features$instrumentalness,centers = 3, iter.max = 10, nstart = 3)

df_audio_features$clusters <- factor(clusters3$cluster)

lev <- levels(df_audio_features$clusters)

labs <- c()
for (i in lev){
  min <- min(df_audio_features$instrumentalness[df_audio_features$clusters==i])
  max <- max(df_audio_features$instrumentalness[df_audio_features$clusters==i])
  lab <- paste(min,max, sep=' - ')
  labs <- append(labs, lab)
}

labs

# barplot(table(factor(clusters3$cluster)), labels = labs)



```


#prueba igal de transformacion y test de normalidad
```{r}
join_audio_charts[1:5,"acousticness"]^2

library(nortest)

log10(df_chart_w_lyrics$acousticness)

for (i in features_continuas){
   x <- log10(df_chart_w_lyrics[,i])
   x <- shapiro.test(x)
   z <- x$p.value
  print(z)
  }


```



# LYRICS


## Filtro por idioma
```{r}
# lyrics = mongo(collection = "lyrics", db = "spotify_dm" )
# df_lyrics <- lyrics$find('{}')
# 
# write.csv(df_lyrics, "data/df_lyrics.csv")

df_lyrics <- read.csv("data/df_lyrics.csv") %>% 
  select(-X)

df_lyrics_unicas <- df_lyrics %>% 
  distinct(artist_name, track_name, lyrics)


#filtro de idioma
spa_lyrics = df_lyrics_unicas[textcat(df_lyrics_unicas$lyrics)=="spanish",]
spa_lyrics

en_lyrics = df_lyrics_unicas[textcat(df_lyrics_unicas$lyrics) %in% c("english", "scots"),]
en_lyrics

#chequeo cantidad de canciones por idioma
100*(nrow(en_lyrics) + nrow(spa_lyrics))/nrow(df_lyrics_unicas)

# tabla contingencia de idiomas
idiomas = textcat(df_lyrics_unicas$lyrics)
# sort(table(idiomas), decreasing = T)

```


### limpieza español
```{r}
# comentar y descomentar según se elija un dataframe u otro
# df_lyrics_seleccionado = df_lyrics_unicas
df_lyrics_seleccionado = en_lyrics

corpus = Corpus(VectorSource(enc2utf8(df_lyrics_seleccionado$lyrics)))

# Eliminamos espacios
corpus.pro <- tm_map(corpus, stripWhitespace)
inspect(corpus.pro[1])

# Elimino todo lo que aparece antes del primer []
corpus.pro <- tm_map(corpus.pro, content_transformer(
  function(x) sub('^.+?\\[.*?\\]',"", x)))
# inspect(corpus.pro[1])

# Elimino las aclaraciones en las canciones, por ejemplo:
# [Verso 1: Luis Fonsi & Daddy Yankee]
corpus.pro <- tm_map(corpus.pro, content_transformer(
  function(x) gsub('\\[.*?\\]', '', x)))

# Elimino todo lo que aparece luego de 'More on Genius'
corpus.pro <- tm_map(corpus.pro, content_transformer(function(x) gsub("More on Genius.*","", x)))

# Convertimos el texto a minúsculas
corpus.pro <- tm_map(corpus.pro, content_transformer(tolower))

# removemos números
corpus.pro <- tm_map(corpus.pro, removeNumbers)

# Podemos agregar palabras a las stopwords
# my_stopwords <- append(stopwords("spanish"), 'palabra')
my_stopwords <- append(stopwords("english"), c('yeah', "aint", "get", "got"))

# Removemos palabras vacias 
corpus.pro <- tm_map(corpus.pro, removeWords, stopwords("english"))
corpus.pro <- tm_map(corpus.pro, removeWords, my_stopwords)
# corpus.pro <- tm_map(corpus.pro, removeWords, stopwords("spanish"))
# inspect(corpus.pro[1])


# Removemos puntuaciones
corpus.pro <- tm_map(corpus.pro, removePunctuation)

# Removemos todo lo que no es alfanumérico
corpus.pro <- tm_map(corpus.pro, content_transformer(function(x) str_replace_all(x, "[[:punct:]]", " ")))

# En tm_map podemos utilizar funciones prop
library(stringi)
replaceAcentos <- function(x) {stri_trans_general(x, "Latin-ASCII")}
corpus.pro <- tm_map(corpus.pro, replaceAcentos)

# Eliminamos espacios que se van generando con los reemplazos
corpus.pro <- tm_map(corpus.pro, stripWhitespace)
```

### limpieza ingles
```{r}
#funciones
#funcion para corregir palabras
decontracted = function(txt){
  txt = gsub("won't", "will not", txt)
  txt = gsub("\\'s", " is", txt)
  txt = gsub("\\'t", " not", txt)
  txt = gsub("\\'ll", " will", txt)
  txt = gsub("\\'m", " am", txt)
  txt = gsub("\\'re", " are", txt)
  txt = gsub("\\'d", " had", txt)
  txt = gsub("\\'ve", " have", txt)
  txt = gsub("couldn", "could", txt)
  txt = gsub("don", "do", txt)
  txt = gsub("doesn", "does", txt)
  txt = gsub("isn", "is", txt)
  txt = gsub("mustn", "must", txt)
  txt = gsub("shouldn", "should", txt)
  txt = gsub("wasn", "was", txt)
  txt = gsub("\\'cause", " because", txt)
  txt = gsub("\\'", "g", txt)
  return(txt)
}


#Función para limpiar. 
text_cleaning = function(txt, stop=FALSE, language){
  
  txt = sub('^.+?\\[.*?\\]',"", txt) #ok
  txt = sub("More on Genius.*","", txt)
  txt = gsub('\\[.*?\\]', '', txt)
  txt = gsub("\\n"," ", txt)
  txt = gsub("[()]", " ", txt)
  txt = tolower(txt)
  txt = decontracted(txt)
  txt = gsub("\\W+\\b", " ", txt)
  txt = gsub("\\d", " ", txt)
  
  stopwords_regex = paste(stopwords('en'), collapse = '\\b|\\b')
  stopwords_regex = paste0('\\b', stopwords_regex, '\\b')
  txt = stringr::str_replace_all(txt, stopwords_regex, '')

  my_stopwords <- c('ooh', 'yeah', "aint", "get", "got", "ayy")
  txt = stringr::str_replace_all(txt, my_stopwords, '')
   
  txt = str_trim(txt)
  txt = gsub("\\n"," ", txt)
  
  if(language == "en"){
    return(txt)
  }else if (language == "es"){
    txt <- function(x) {stri_trans_general(x, "Latin-ASCII")}
      return(txt) 
  }else{
        return("Falta definir lenguaje")
      }
}

#función para obtener oraciones de una sola palabra. 
one_word_setences = function(txt){
  return(gsub("\\W+\\b", ". ", txt))
}

#limpio las letras en ingles
en_lyrics$lyrics = text_cleaning(en_lyrics$lyrics, language = "en")

head(en_lyrics$lyrics, 1)


```



## Explicit
### Español
```{r}
#Diccionario español
malas_palabras_1 <- read_csv("data/malas_palabras.txt", 
    col_names = FALSE)

malas_palabras_2 <- read_csv("data/malas_palabras_translate.txt", 
    col_names = FALSE)

malas_palabras_3 <- read_csv("data/malas_palabras_wiki.txt", 
    col_names = FALSE) %>% 
  select(X1)

malas_palabras_4 <- read_csv("data/palabras_profanas_es.txt", 
                             col_names = FALSE)

malas_palabras <- rbind(malas_palabras_1, malas_palabras_2,
                        malas_palabras_3, malas_palabras_4)


#Función para limpiar. 
text_cleaning_esp = function(txt, stop=FALSE){
  txt = sub('^.+?\\[.*?\\]',"", txt) #ok
  txt = sub("More on Genius.*","", txt)
  txt = gsub('\\[.*?\\]', '', txt)
  txt = gsub("\\n"," ", txt)
  txt = gsub("[()]", " ", txt)
  txt = tolower(txt)
  # txt = decontracted(txt)
  txt = gsub("\\W+\\b", " ", txt)
  txt = gsub("\\d", " ", txt)
  txt = str_trim(txt)
  # txt = stri_trans_general(txt, "Latin-ASCII")
  return(txt)
}


malas_palabras$limpias = text_cleaning(malas_palabras$X1)
malas_palabras

malas_palabras %>% filter(startsWith(limpias, "g"))

```

### Inglés
```{r}
#Genero lista de malas palabras
bad_words <- c()
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_zac_anger)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_alvarez)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_arr_bad)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_racist)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_banned)))
bad_words <- unique(bad_words)

biglou <- read.csv("https://www.cs.cmu.edu/~biglou/resources/bad-words.txt", header=FALSE, col.names = c("words"))


#Función para obtener palabras profanas de cada lyric
get_profanities = function(txt, profanity_lst){
  # txt = text_cleaning(txt)
  words = as.data.frame(strsplit(txt, "[ ]+"), col.names = "words")
  profan_df = profanity(get_sentences(words), profanity_list = profanity_lst)
  profan_words = profan_df[profan_df$profanity_count!=0,]$words
  vector = as.vector(profan_words)
  if (length(vector)==0){
    return(NULL)
  }
  else{return(as.vector(profan_words))
    }
}



en_lyrics$profabe_biglou <- lapply(en_lyrics$lyrics,  function(x) get_profanities(x, biglou$words))

en_lyrics %>% 
  mutate(profane_biglou = unlist(get_profanities(lyrics, biglou$words)))

en_lyrics$profabe_biglou = unlist(strsplit(en_lyrics$profabe_biglou, split = " "))

en_lyrics$profabe_badwords <- lapply(en_lyrics$lyrics, function(x) get_profanities(x, bad_words))

str(en_lyrics)
head(en_lyrics,1)

en_lyrics$profabe_biglou[3]

```


## MATRIZ TERMINO DOCUMENTO
```{r}
####################################################################
####### Generación de la Matríz Término-Documento del corpus #######
####################################################################
corpus.pro2tdm <- function(corpus, ponderacion, n_terms){
  #corpus
  
  
  #matriz TD 
  dtm <- TermDocumentMatrix(corpus,
                            control = list(weighting = ponderacion))
  matriz_td <- as.matrix(dtm)
  
  
  # Calculamos la frecuencia de cada término en el corpus
  freq_term <- head(sort(rowSums(matriz_td),decreasing=TRUE), n_terms)
  
  #matriz transpuesta de los n_terms mas frecuentes
  matriz_nf <- t(matriz_td[sort(names(freq_term)), ])
  
  #pasaje a binario
  matriz_nf[matriz_nf>0] <- 1
  
  return(matriz_nf)
  
  }
  
corpus_eng = Corpus(VectorSource(enc2utf8(en_lyrics$lyrics)))
matriz <- corpus.pro2tdm(corpus = corpus_eng, ponderacion= "weightTf",n_terms= 150)

dim(matriz)

df_tm <- as.data.frame(matriz)
head(df_tm,2)

## Join matriz de palabras con artista y track
df_ly_feat <- cbind(df_lyrics_seleccionado[-c(3)], df_tm)

nrow(df_tm)
nrow(df_lyrics_seleccionado)
nrow(df_ly_feat)

filter <- !names(df_ly_feat) %in% c("artist_name", "track_name" )

df_ly_feat_ok <- df_ly_feat[, filter]
# df_ly_feat_ok = df_ly_feat_ok[, -(which(colSums(df_ly_feat_ok) == 0))]

# colSums(df_ly_feat_ok)

head(df_ly_feat_ok, 3)
head(df_ly_feat, 3)


df_ly_feat$id = 1:nrow(df_ly_feat)

df_melt <- reshape2::melt(data = df_ly_feat[,3:ncol(df_ly_feat)], id.vars = c("id"))  %>%
  arrange(id)

df_melt <- df_melt[df_melt$value != 0,]

df_melt_txt <- df_melt[df_melt$value == 1,]
df_melt_cat <- df_melt[df_melt$value != 1,]

head(df_melt_txt )
dim(df_melt_txt )

#denomino a los términos profanos
df_melt_txt <- df_melt_txt %>% 
  mutate(variable = case_when(as.character(variable) %in% biglou$words ~
                                paste0("PROF_", as.character(variable)),
                              T ~ paste0("TERM_", as.character(variable))
                              )  
         )

df_melt_txt %>% filter(startsWith(variable, "PROF"))


# df_melt_txt[df_melt_txt$variable %in% biglou$words,]


df_melt_txt_to_ruls <- df_melt_txt[, -c(3)]
names(df_melt_txt_to_ruls) <- c("id", "item")

write.table(df_melt_txt_to_ruls, file="data/transaccions_lyrics_features.txt", row.names = F)

# Reglas
# chequear nan's
lyrics_trans <- read.transactions("data/transaccions_lyrics_features.txt", format = "single", cols = c(1,2))

arules::inspect(head(lyrics_trans, 3))

summary(lyrics_trans)
reglas <- apriori(lyrics_trans, parameter = list(support=0.1,
                    confidence = 0.5, target  = "rules"  ))

reglas_sub <- subset(reglas, subset = rhs %pin% "PROF_")
arules::inspect(head(sort(reglas_sub, by = "lift", decreasing = T),5))

```


## Carga de Igal (UNIFICAR)
```{r}
df_lyrics_unicas <- df_lyrics %>% distinct(artist_name, track_name, lyrics)
nrow(df_lyrics_unicas)

df_chart_w_lyrics <- merge(join_audio_charts, df_lyrics_unicas, by.x = c("artist_name","track_name"), by.y= c("artist_name","track_name"), all.x=TRUE, all.y = FALSE)

df_chart_w_lyrics <- df_chart_w_lyrics[!is.na(df_chart_w_lyrics$lyrics),]

```


## Explicit

### contar malas palabras (Parte de Igal: UNIFICAR)
```{r}

bad_words <- c()
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_zac_anger)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_alvarez)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_arr_bad)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_racist)))
bad_words <- append(bad_words, unique(tolower(lexicon::profanity_banned)))

bad_words <- unique(bad_words)


contar_bad_words <- function(x){
  x <- profanity(x,profanity_list = bad_words)
  q <- sum(x$profanity_count)
  return (q)
  }
df_chart_w_lyrics$cant_bad_words <- sapply(df_chart_w_lyrics[,"lyrics"], contar_bad_words)


df_chart_w_lyrics_only_explicit <- df_chart_w_lyrics[df_chart_w_lyrics$explicit==TRUE & df_chart_w_lyrics$cant_bad_words > 0, ]

hist(df_chart_w_lyrics_only_explicit$cant_bad_words)


#creo vars categóricas
df_chart_w_lyrics_only_explicit$nivel_puteada <- cut(df_chart_w_lyrics_only_explicit$cant_bad_words, breaks = c(0,10,20,50,Inf), labels=c("bajo","poco","alto","muy_alto"))

df_chart_w_lyrics_only_explicit$nivel_ranking <- cut(df_chart_w_lyrics_only_explicit$position_avg, breaks = c(1,100,Inf), labels=c("1a100","100a200"))

df_chart_w_lyrics_only_explicit$nivel_popularidad <- cut(sqrt(df_chart_w_lyrics_only_explicit$cant_bad_words), breaks = c(0,10,20,50,Inf), labels=c("bajo","poco","alto","muy_alto"))

transactions <- as(as.data.frame(apply(df_chart_w_lyrics_only_explicit, 2, as.factor)), "transactions")
rules = apriori(transactions, parameter=list(target="rules", confidence=0.25, support=0.1))
rules.sub <- subset(rules, subset = lhs %pin% "nivel_puteada" & rhs %pin% "nivel_ranking")
inspect(head(sort(rules.sub, by = "lift", decreasing = TRUE),10))

# discretizacion continuas y seleccion de variables
# identificar palabras explít

```



```{r}

```





# LIMPIO HASTA ACA

# Preguntas de investigacion

## Patron Comun Canciones del Chart
¿Qué características tienen las canciones que están en el chart? ¿Cual es el patrón comun que tienen las canciones más escuchadas? (ver dispersiones, media, grafico comparativo)
```{r}


#funcion para escalar variable
scale_vble <- function(x){
  (x - mean(x, na.rm = T))/sd(x, na.rm = T)
}

```
```{r}
#anti_join
anti_join_audio_charts <- df_audio_features %>% 
  select("artist_name","artist_all", "artist_key",
         "track_name", "external_urls_spotify", "album_name", "album_release_year",
         all_of(features_continuas), all_of(features_categoricas)) %>% 
  anti_join( df_charts %>%
               select( "Track_Name", "Artist", "URL"),
               by = c("external_urls_spotify" ="URL",
                      "artist_key" ="Artist"  ))
               # by = c("track_name" = "Track_Name"))


anti_join_audio_charts_complete <- na.omit(anti_join_audio_charts)
anti_join_audio_charts_complete_scale <- anti_join_audio_charts_complete %>% 
  distinct() %>% 
  select(features_continuas)  %>% 
  mutate_all(scale_vble)
nrow(anti_join_audio_charts_complete_scale)

```

## Qué temas perduran mucho en el ranking

### Artistas que mas aparecen en el chart
```{r}
join_audio_charts %>% 
  group_by(artist_name) %>% 
  dplyr::summarise(n = n()) %>% 
  arrange(-n)
```

### Tracks que mas aparecen en el chart
```{r}
join_audio_charts %>% 
  group_by(track_name, artist_name,external_urls_spotify) %>% 
  dplyr::summarise(n = n()) %>% 
  arrange(-n) %>% 
  select(track_name, n, everything(.))

```


# ¿Cuánto tiempo están en un chart? 

```{r}
# cantidad de semanas que estuvieron en el chart

df_charts %>% 
  mutate(week_start=as.Date(week_start),
         week_end = as.Date(week_end),
         week_year = (year(week_start))) %>%
  arrange(Artist, Track_Name) %>% 
  group_by(Artist, Track_Name, URL) %>% 
 dplyr:: summarise( day_in = min(week_start),
             year_in = year(day_in),
             day_max = max(week_end),
             year_max = year(day_max),
             duracion_chart_dias = day_max-day_in,
             duracion_chart_anio = year_max - year_in) %>% 
  arrange(Artist)

```

